Dependence of spin induced structural transitions on level density and Neutron emission spectra

Abstract

The impact of spin induced deformation and shape phase transitions on nuclear level density and consequently on neutron emission spectra of the decay of compound nuclear systems 112^Ru to 123^Cs (N = 68 isotones) is investigated in a microscopic framework of Statistical theory of superfluid nuclei. Our calculations are in good accord with experimental data for evaporation residue of 119^Sb^* and 185^Re^* and show a strong correlation between spin induced structural transitions and NLD. We find that the inverse level density parameter K increases with increasing spin for all the systems, but it decreases with a deformation or a shape change that results in the enhancement of level density and emission probability. A sharp shape phase transition from oblate to uncommon prolate non-collective in well deformed nuclei leads to band crossing and enhancement of level density which fades away while approaching sphericity at or near shell closure manifesting shell effects.

6 pages, 8 figures. Accepted in Nuclear Physics A

References in corpus (5)

• Monte Carlo evaluation of path integrals for the nuclear shell model
• Two-Proton Radioactivity with 2p halo in light mass nuclei A$=$18$-$34
• Measurement of the damping of nuclear shell effect in the doubly magic ${}^{208}$Pb region
• Experimental investigation on the temperature dependence of the nuclear level density parameter
• Shape Transition to a Rare Shape Phase of Prolate Non-collective in A = 100 Isobars

Cited by in corpus (3)

• Excitation energy and angular momentum dependence of the nuclear level density parameter around A$\approx$110
• Impact of the quenching of shell effects with excitation energy on Nuclear Level Density
• Restricted baby Skyrme-Maxwell theory in a magnetic medium: BPS configurations and some properties